Perhaps you should try some spelling variations:
luat duoc » luat tuc
dang cay » dang xay, dang ca, dang cac
cay phoi » cap phoi, tay hoi, cay cho
va thanh » gia thanh, ban thanh, va tinh
thanh vi » hanh vi, thanh va, thanh ve
dua tren » dung tren
ky dang » ky nang, ky danh
hieu va » lieu va
duoc va » nuoc va, duc va, duoc ma
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ky dang cay phoi. ((hieu va) OR (hieu qua)) luat duoc va thanh vi ((dua tren) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky dang cay phoi. ((hieu va) OR (hieu qua)) luat duoc va thanh vi ((dua tren) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: tu cac ky dang cay phoi. ((hieu va) OR (hieu qua)) luat duoc va thanh vi ((dua tren) OR (cua te))*.